In boreal forests, nitrogen supply is a limiting factor for plant growth. Fertilizing with nitrogen can double tree biomass, but may interfere with ecosystem functionality, changing plant species composition and soil microbial communities. The research in my group targets nitrogen effects on ecophysiological mechanisms driving nitrogen-induced ecosystem changes. The aim is to increase our knowledge of both positive and negative effects of nitrogen enrichment on important ecosystem services, such as productivity, carbon sequestration, nitrogen retention and biodiversity. Ultimately, we seek ways to wisely manage nitrogen use in forest ecosystems.
In particular I am interested in how competition for nitrogen between trees of different sizes and of different species structures forest ecosystems.The aim is to develop management measures in continuous cover forestry and in mixed species forestry, e.g. managing forests by managing the distribution of nitrogen. In addition, I study flux and storage of nitrogen and carbon between the different compartments in forest ecosystems, i.e. trees, field-layer vegetation, bottom-layer vegetation and soil biota.The aim is to increase our understanding of ecosystem stoichiometry in relation to the nitrogen availability
|Forest field-layer dominated by Vaccinium myrtillus L||Vaccinium myrtillus diseased by a fungal leaf pathogen (Valdensia heterodoxa).|
Additionally, for the period 2010 – 2016 I am the program director of the Future Forests research program. Future Forests is the largest investment ever in applied forestry research in Sweden.The overarching objective of the program's interdis- ciplinary research is to identify scientifically-based strategies that can optimise benefits from the forest for the sustainable society of the future.
- Gundale M, Holm-Bach L, From F, Nordin A. Anthropogenic nitrogen deposition in boreal forests has a minor impact on the global carbon cycle. Global Change Biology. Accepted for publication.
- Gundale M, Holm-Bach L, Nordin A. The impact of simulated chronic nitrogen deposition on the biomass and N2-fixation activity of two boreal feather moss - cyanobacteria associations. Biology Letters. Accepted for publication.
- Hedwall P-O, Strengbom J, Nordin A. (2013). Can thinning alleviate negative effects of fertilization on boreal forest floor vegetation? Forest, Ecology & Management 310: 382-392.
- Hedwall P-O, Nordin A, Strengbom J, Brunet J, Olsson B. (2013). Does background nitrogen deposition affect the response of boreal vegetation to fertilization? Oecologia 173: 615-624.
- Hedwall P-O, Brunet J, Nordin A, Bergh J. (2012). Changes in the abundance of forest key-stone species in response to changes in forest structure. Journal of Vegetation Science